How is the animal world filmed by CCTV?

I can tell you responsibly that those are foreign video materials, which CCTV bought at a high price.

There are many ways. For example, when shooting close-ups of wild animals such as bears, lions and tigers, most of them are armed with cameras in the shape of rock trunks, and the smell should be eliminated because animals are very sensitive to smell. Some of them were taken by satellite positioning combined with helicopters. Many close-ups are taken by putting a collar around an animal's neck with a camera. As for small animals such as insects, most of them are taken directly. I don't know if you are satisfied.